Heat exchanger

ABSTRACT

Heat exchangers of generally cylindrical shape, including structure having at least two chambers being wound on themselves in self-enclosing spirals, baffles forming passageways through said chambers to facilitate the flow of heat-exchanging media through said chambers in alternate centripetal and centrifugal relationship.

United States Patent Jou't et al.

[451 Dec. 12,1972

, HEAT EXCHANGER Inventors: Etienne Joue't, 19 rue du Panorama, Montigny-les-Cormeilles; Pascal Rebuif, 18 rue de Sevres, Boulonge-Billancourt, both of France Filed: Dec. 29, 1969 Appl. No.: 888,591

Foreign Application Priority Data Dec. 27, 1968 France ..68181215 June 20, 1969 France ..6920823 July 8, 1969 France ..6923092 US. Cl ..l65/166 Int. Cl. ..F25f 3/00 Field of Search ..l65/166 [56] References Cited UNITED STATES PATENTS 2,136,086 11/1938 Rosenblad 165/166 2,142,679 1/1939 Seifert .165/166 Primary Examiner-Charles Sukalo Attorney-Waters, Roditi, Schwartz & Nissen [5 7] ABSTRACT Heat exchangers of generally cylindrical shape, including structure having at least two chambers being wound on themselves in self-enclosing spirals, baffles forming passageways through said chambers to facilitate the flow of heat-exchanging media through said chambers in alternate centripetal and centrifugal relationship.

2 Claims, 38 Drawing Figures PATENTED 12 I97? SHEET OlUF 24 PATENTED DEC 12 1972 SHEET UEUF 24 PATENTEB an: 12 m2 SHEET 03UF 24 PATENTEDHEB 2 I9 3. 705 6 l 8 SHEET USUF 24 FIG. 7

PATENTED um: 12 m2 sum 07 or 24 PATENTED HEB 2 9 3.7 05,618 SHEET 08 0F 24 FIG. 72

SHEET 09 [1F 24 PATENTEU DEB 12 I972 l lb lllu i y /w\ FIG. 73

PATENTED DEC 12 I972 SHEET 100F24 l ll r" PATENTEI] min 12 I972 SHEET 110F24 PATENTED 12 I972 3.705.618

SHEET 12 0F 24 H H .llll

PATENTEI] DEC 12 I972 SHEET 13 0F 24 PATENTED DEC 12 I972 SHEET 1n HF 24 FIG. 27

PATENTED DEC 12 I972 SHEET 1a or 24 

1. Heat exchanger between two fluids, said heat exchanger being of generally cylindrical form comprising: a. two chambers wound in enclosing and juxtaposed spirals, a thin metal wall separating each of the two chambers from the adjacent one, said thin metal wall being provided with gofferings, the gofferings in one wall abutting against the adjacent wall; b. a central cylindrical tube, said chambers spirally encompassing said tube; c. an external cylindrical hoop concentric with said central tube, said central and external tubes both constituting the framework of the heat exchanger, the spirally coiled chambers being contained in the annular space between said central tube and said external hoop, the external cylindrical hoop extending beyond the level of the spirally coiled chambers; d. closure caps attached to said external cylindrical hoop so as to define two enclosures, each enclosure connecting directly with one spirally coiled chamber by the open lateral section thereof; e. partition means located in each enclosure dividing the latter into two capacities, respectively an inlet and an outlet; f. baffles formed of prismatic elements located in each spiral of the spirally coiled chambers, along the axis of said chambers and extending in the same plane as said partition means, said baffle elements being provided with a thickness corresponding to the spacing between two adjacent walls and being held in place by said gofferings, said baffle elements dividing the corresponding chambers into two parts, said baffle elements being shorter than the height of the spirally coiled chambers, so as to allow the fluid to pass from one part of the said chambers which is connected with the inlet capacity to the other part of the chamber which is connected with the outlet capacity.
 2. Heat exchanger according to claim 1, wherein each said baffle element is tightly connected to the said partition means and is formed with a length adapted to leave a free passage in the bottom of the corresponding spiral of the chambers concerned, said passage being of a section equal to one quarter of the lateral section of the corresponding spiral. 